chore: move tests out of core and into the top level crate

This commit moves the tests out of core so rust analyzer
is happier with the workspace.

tests/miri_stress.rs

@@ -0,0 +1,418 @@
+#![allow(non_snake_case)]
+/*
+Stress Miri as much as possible.
+
+Prove that we don't leak memory and that our methods are safe.
+
+Specifically:
+- [ ] VirtualDom drops memory safely
+- [ ] Borrowed components don't expose invalid pointers
+- [ ] Async isn't busted
+*/
+
+use dioxus::prelude::*;
+use dioxus_core::SchedulerMsg;
+
+mod test_logging;
+
+const IS_LOGGING_ENABLED: bool = false;
+
+fn new_dom<P: 'static + Send>(app: Component<P>, props: P) -> VirtualDom {
+    test_logging::set_up_logging(IS_LOGGING_ENABLED);
+    VirtualDom::new_with_props(app, props)
+}
+
+/// This test ensures that if a component aborts early, it is replaced with a placeholder.
+/// In debug, this should also toss a warning.
+#[test]
+fn test_memory_leak() {
+    fn app(cx: Scope) -> Element {
+        let val = cx.use_hook(|_| 0);
+
+        *val += 1;
+
+        if *val == 2 || *val == 4 {
+            return None;
+        }
+
+        let name = cx.use_hook(|_| String::from("asd"));
+
+        cx.render(rsx!(
+            div { "Hello, world!" }
+            child()
+            child()
+            child()
+            child()
+            child()
+            child()
+            borrowed_child(na: name)
+            borrowed_child(na: name)
+            borrowed_child(na: name)
+            borrowed_child(na: name)
+            borrowed_child(na: name)
+        ))
+    }
+
+    #[derive(Props)]
+    struct BorrowedProps<'a> {
+        na: &'a str,
+    }
+
+    fn borrowed_child<'a>(cx: Scope<'a, BorrowedProps<'a>>) -> Element {
+        rsx!(cx, div {
+            "goodbye {cx.props.na}"
+            child()
+            child()
+        })
+    }
+
+    fn child(cx: Scope) -> Element {
+        rsx!(cx, div { "goodbye world" })
+    }
+
+    let mut dom = new_dom(app, ());
+
+    dom.rebuild();
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+}
+
+#[test]
+fn memo_works_properly() {
+    fn app(cx: Scope) -> Element {
+        let val = cx.use_hook(|_| 0);
+
+        *val += 1;
+
+        if *val == 2 || *val == 4 {
+            return None;
+        }
+
+        let name = cx.use_hook(|_| String::from("asd"));
+
+        cx.render(rsx!(
+            div { "Hello, world! {name}" }
+            child(na: "asdfg".to_string() )
+        ))
+    }
+
+    #[derive(PartialEq, Props)]
+    struct ChildProps {
+        na: String,
+    }
+
+    fn child(cx: Scope<ChildProps>) -> Element {
+        rsx!(cx, div { "goodbye world" })
+    }
+
+    let mut dom = new_dom(app, ());
+
+    dom.rebuild();
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+    dom.hard_diff(ScopeId(0));
+}
+
+#[test]
+fn free_works_on_root_props() {
+    fn app(cx: Scope<Custom>) -> Element {
+        cx.render(rsx! {
+            child(a: "alpha")
+            child(a: "beta")
+            child(a: "gamma")
+            child(a: "delta")
+        })
+    }
+
+    #[derive(Props, PartialEq)]
+    struct ChildProps {
+        a: &'static str,
+    }
+
+    fn child(cx: Scope<ChildProps>) -> Element {
+        rsx!(cx, "child {cx.props.a}")
+    }
+
+    struct Custom {
+        val: String,
+    }
+
+    impl Drop for Custom {
+        fn drop(&mut self) {
+            dbg!("dropped! {}", &self.val);
+        }
+    }
+
+    let mut dom = new_dom(app, Custom { val: String::from("asd") });
+    dom.rebuild();
+}
+
+#[test]
+fn free_works_on_borrowed() {
+    fn app(cx: Scope) -> Element {
+        cx.render(rsx! {
+            child(a: "alpha", b: "asd".to_string())
+        })
+    }
+    #[derive(Props)]
+    struct ChildProps<'a> {
+        a: &'a str,
+        b: String,
+    }
+
+    fn child<'a>(cx: Scope<'a, ChildProps<'a>>) -> Element {
+        dbg!("rendering child");
+        rsx!(cx, "child {cx.props.a}, {cx.props.b}")
+    }
+
+    impl Drop for ChildProps<'_> {
+        fn drop(&mut self) {
+            dbg!("dropped child!");
+        }
+    }
+
+    let mut dom = new_dom(app, ());
+    let _ = dom.rebuild();
+}
+
+#[test]
+fn free_works_on_root_hooks() {
+    /*
+    On Drop, scopearena drops all the hook contents.
+    */
+
+    struct Droppable<T>(T);
+    impl<T> Drop for Droppable<T> {
+        fn drop(&mut self) {
+            dbg!("dropping droppable");
+        }
+    }
+
+    fn app(cx: Scope) -> Element {
+        let name = cx.use_hook(|_| Droppable(String::from("asd")));
+        rsx!(cx, div { "{name.0}" })
+    }
+
+    let mut dom = new_dom(app, ());
+    let _ = dom.rebuild();
+}
+
+#[test]
+fn old_props_arent_stale() {
+    fn app(cx: Scope) -> Element {
+        dbg!("rendering parent");
+        let cnt = cx.use_hook(|_| 0);
+        *cnt += 1;
+
+        if *cnt == 1 {
+            rsx!(cx, div { child(a: "abcdef".to_string()) })
+        } else {
+            rsx!(cx, div { child(a: "abcdef".to_string()) })
+        }
+    }
+
+    #[derive(Props, PartialEq)]
+    struct ChildProps {
+        a: String,
+    }
+    fn child(cx: Scope<ChildProps>) -> Element {
+        dbg!("rendering child", &cx.props.a);
+        rsx!(cx, div { "child {cx.props.a}" })
+    }
+
+    let mut dom = new_dom(app, ());
+    let _ = dom.rebuild();
+
+    dom.handle_message(SchedulerMsg::Immediate(ScopeId(0)));
+    dom.work_with_deadline(|| false);
+
+    dom.handle_message(SchedulerMsg::Immediate(ScopeId(0)));
+    dom.work_with_deadline(|| false);
+
+    dom.handle_message(SchedulerMsg::Immediate(ScopeId(0)));
+    dom.work_with_deadline(|| false);
+
+    dbg!("forcing update to child");
+
+    dom.handle_message(SchedulerMsg::Immediate(ScopeId(1)));
+    dom.work_with_deadline(|| false);
+
+    dom.handle_message(SchedulerMsg::Immediate(ScopeId(1)));
+    dom.work_with_deadline(|| false);
+
+    dom.handle_message(SchedulerMsg::Immediate(ScopeId(1)));
+    dom.work_with_deadline(|| false);
+}
+
+#[test]
+fn basic() {
+    fn app(cx: Scope) -> Element {
+        rsx!(cx, div {
+            child(a: "abcdef".to_string())
+        })
+    }
+
+    #[derive(Props, PartialEq)]
+    struct ChildProps {
+        a: String,
+    }
+
+    fn child(cx: Scope<ChildProps>) -> Element {
+        dbg!("rendering child", &cx.props.a);
+        rsx!(cx, div { "child {cx.props.a}" })
+    }
+
+    let mut dom = new_dom(app, ());
+    let _ = dom.rebuild();
+
+    dom.handle_message(SchedulerMsg::Immediate(ScopeId(0)));
+    dom.work_with_deadline(|| false);
+
+    dom.handle_message(SchedulerMsg::Immediate(ScopeId(0)));
+    dom.work_with_deadline(|| false);
+}
+
+#[test]
+fn leak_thru_children() {
+    fn app(cx: Scope) -> Element {
+        cx.render(rsx! {
+            Child {
+                name: "asd".to_string(),
+            }
+        });
+        cx.render(rsx! {
+            div {}
+        })
+    }
+
+    #[inline_props]
+    fn Child(cx: Scope, name: String) -> Element {
+        rsx!(cx, div { "child {name}" })
+    }
+
+    let mut dom = new_dom(app, ());
+    let _ = dom.rebuild();
+
+    dom.handle_message(SchedulerMsg::Immediate(ScopeId(0)));
+    dom.work_with_deadline(|| false);
+
+    dom.handle_message(SchedulerMsg::Immediate(ScopeId(0)));
+    dom.work_with_deadline(|| false);
+}
+
+#[test]
+fn test_pass_thru() {
+    #[inline_props]
+    fn NavContainer<'a>(cx: Scope, children: Element<'a>) -> Element {
+        cx.render(rsx! {
+            header {
+                nav { children }
+            }
+        })
+    }
+
+    fn NavMenu(cx: Scope) -> Element {
+        rsx!(cx,
+            NavBrand {}
+            div {
+                NavStart {}
+                NavEnd {}
+            }
+        )
+    }
+
+    fn NavBrand(cx: Scope) -> Element {
+        rsx!(cx, div {})
+    }
+
+    fn NavStart(cx: Scope) -> Element {
+        rsx!(cx, div {})
+    }
+
+    fn NavEnd(cx: Scope) -> Element {
+        rsx!(cx, div {})
+    }
+
+    #[inline_props]
+    fn MainContainer<'a>(
+        cx: Scope,
+        nav: Element<'a>,
+        body: Element<'a>,
+        footer: Element<'a>,
+    ) -> Element {
+        cx.render(rsx! {
+            div {
+                class: "columns is-mobile",
+                div {
+                    class: "column is-full",
+                    nav,
+                    body,
+                    footer,
+                }
+            }
+        })
+    }
+
+    fn app(cx: Scope) -> Element {
+        let nav = cx.render(rsx! {
+            NavContainer {
+                NavMenu {}
+            }
+        });
+        let body = cx.render(rsx! {
+            div {}
+        });
+        let footer = cx.render(rsx! {
+            div {}
+        });
+
+        cx.render(rsx! {
+            MainContainer {
+                nav: nav,
+                body: body,
+                footer: footer,
+            }
+        })
+    }
+
+    let mut dom = new_dom(app, ());
+    let _ = dom.rebuild();
+
+    for _ in 0..40 {
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(0)));
+        dom.work_with_deadline(|| false);
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(0)));
+        dom.work_with_deadline(|| false);
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(0)));
+        dom.work_with_deadline(|| false);
+
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(1)));
+        dom.work_with_deadline(|| false);
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(1)));
+        dom.work_with_deadline(|| false);
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(1)));
+        dom.work_with_deadline(|| false);
+
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(2)));
+        dom.work_with_deadline(|| false);
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(2)));
+        dom.work_with_deadline(|| false);
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(2)));
+        dom.work_with_deadline(|| false);
+
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(3)));
+        dom.work_with_deadline(|| false);
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(3)));
+        dom.work_with_deadline(|| false);
+        dom.handle_message(SchedulerMsg::Immediate(ScopeId(3)));
+        dom.work_with_deadline(|| false);
+    }
+}